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CSTX
U.S. Army Maj. John Diller of Orange Park, Fla., a chaplain for the 207th Regional Support Group, tests out his protective mask at the Combat Support Training Exercise in Fort McCoy, Wis., Aug. 15, 2019. Troops dealt with simulated attacks, including actual tear gas, during the August event. (U.S. Army photo by Capt. Terry Williams, 207th Regional Support Group)